Shulou(Shulou.com)06/02 Report--

This article mainly introduces "what is Semaphore". In daily operation, I believe many people have doubts about what is Semaphore. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "what is Semaphore?" Next, please follow the editor to study!

Semaphore (semaphore)

Note that the alien sends out a certain amount of signal (permits). Other aliens receive the signal and use it (acquire), and then tell the sender to stop using it (release). If the signal is used up, we can only wait.

Purpose: multi-thread running current limit, flow control, database thread pool control, control sequence execution

Provide both fair and unfair ways.

Class ZeroEvenOdd {private int n; private Semaphore z = new Semaphore (1); private Semaphore e = new Semaphore (0); private Semaphore o = new Semaphore (0); public ZeroEvenOdd (int n) {this.n = n;} / / printNumber.accept (x) outputs "x", where x is an integer. Public void zero (IntConsumer printNumber) throws InterruptedException {for (int I = 0 bori)

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